// Shows how to write the full contents of an OPC UA file at once, using the file transfer client.
// Note: Consider using a higher-level abstraction, OPC UA file provider, instead.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
using System;
using System.IO;
using System.Text;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.FileTransfer;
using OpcLabs.EasyOpc.UA.IO.Extensions;
namespace UADocExamples.FileTransfer._EasyUAFileTransferClient
{
class WriteAllBytes
{
public static void Main1()
{
// Unified Automation .NET based demo server (UaNETServer/UaServerNET.exe)
UAEndpointDescriptor endpointDescriptor = "opc.tcp://localhost:48030";
// A node that represents an instance of OPC UA FileType object.
UANodeDescriptor fileNodeDescriptor = "nsu=http://www.unifiedautomation.com/DemoServer/ ;s=Demo.Files.TextFile";
// Instantiate the file transfer client object
var fileTransferClient = new EasyUAFileTransferClient();
// Write all contents into a specified file node.
byte[] bytes = Encoding.UTF8.GetBytes("TEXT FROM FILE TRANSFER CLIENT EXAMPLE. Demonstrates writing the whole contents of a file at once.");
try
{
Console.WriteLine("Writing the whole file...");
fileTransferClient.WriteAllBytes(endpointDescriptor, fileNodeDescriptor, bytes);
// Due to an issue in the server, the file might not be readable now, without server restart.
//Console.WriteLine("Reading the data back...");
//byte[] data = fileTransferClient.ReadAllFileBytes(endpointDescriptor, fileNodeDescriptor);
//Console.WriteLine(Encoding.UTF8.GetString(data));
}
// Beware that WriteAllFileBytes throws IOException and not UAException.
catch (IOException ioException)
{
Console.WriteLine("*** Failure: {0}", ioException.GetBaseException().Message);
return;
}
Console.WriteLine();
Console.WriteLine("Finished...");
}
}
}
# Shows how to write the full contents of an OPC UA file at once, using the file transfer client.
# Note: Consider using a higher-level abstraction, OPC UA file provider, instead.
#
# Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
# OPC client and subscriber examples in Python on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-Python .
# The QuickOPC package is needed. Install it using "pip install opclabs_quickopc".
import opclabs_quickopc
# Import .NET namespaces.
from System.Text import *
from OpcLabs.EasyOpc.UA import *
from OpcLabs.EasyOpc.UA.Extensions import *
from OpcLabs.EasyOpc.UA.FileTransfer import *
from OpcLabs.EasyOpc.UA.IO.Extensions import *
from OpcLabs.EasyOpc.UA.Navigation import *
# Unified Automation .NET based demo server (UaNETServer/UaServerNET.exe).
endpointDescriptor = UAEndpointDescriptor('opc.tcp://localhost:48030')
endpointDescriptor = UAEndpointDescriptorExtension.WithUserNameIdentity(endpointDescriptor,'john', 'master')
# A node that represents an instance of OPC UA FileType object.
fileNodeDescriptor = UANodeDescriptor('nsu=http://www.unifiedautomation.com/DemoServer/ ;s=Demo.Files.TextFile')
# Instantiate the file transfer client object.
fileTransferClient = EasyUAFileTransferClient()
# Prevent prompt to trust the server certificate (INSECURE, used just for smooth example flow).
EasyUAClient.SharedParameters.EngineParameters.CertificateAcceptancePolicy.TrustEndpointUrlString(
endpointDescriptor.UrlString)
# Write all contents into a specified file node.
bytes = Encoding.UTF8.GetBytes('TEXT FROM FILE TRANSFER CLIENT EXAMPLE. Demonstrates writing the whole contents of a '
'file at once.')
try:
print('Writing the whole file...')
IEasyUAFileTransferExtension2.WriteAllBytes(fileTransferClient,
endpointDescriptor,
UANamedNodeDescriptor(fileNodeDescriptor),
bytes)
# Due to an issue in the server, the file might not be readable now, without server restart.
print('Reading the data back...')
data = IEasyUAFileTransferExtension2.ReadAllBytes(fileTransferClient,
endpointDescriptor,
UANamedNodeDescriptor(fileNodeDescriptor))
print(Encoding.UTF8.GetString(data))
# Beware that ReadAllFileBytes throws IOException and not UAException.
except IOException as ioException:
print('*** Failure: ' + ioException.GetBaseException().Message)
exit()
print()
print('Finished.')
' Shows how to write the full contents of an OPC UA file at once, using the file transfer client.
' Note: Consider using a higher-level abstraction, OPC UA file provider, instead.
'
' Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
Imports System.IO
Imports System.Text
Imports OpcLabs.EasyOpc.UA
Imports OpcLabs.EasyOpc.UA.FileTransfer
Imports OpcLabs.EasyOpc.UA.IO.Extensions
Namespace FileTransfer._EasyUAFileTransferClient
Friend Class WriteAllBytes
Public Shared Sub Main1()
' Unified Automation .NET based demo server (UaNETServer/UaServerNET.exe)
Dim endpointDescriptor As UAEndpointDescriptor = "opc.tcp://localhost:48030"
' A node that represents an instance of OPC UA FileType object.
Dim fileNodeDescriptor As UANodeDescriptor = "nsu=http://www.unifiedautomation.com/DemoServer/ ;s=Demo.Files.TextFile"
' Instantiate the file transfer client object
Dim fileTransferClient = New EasyUAFileTransferClient
' Write all contents into a specified file node.
Dim bytes As Byte() = Encoding.UTF8.GetBytes("TEXT FROM FILE TRANSFER CLIENT EXAMPLE. Demonstrates writing the whole contents of a file at once.")
Try
Console.WriteLine("Writing the whole file...")
fileTransferClient.WriteAllBytes(endpointDescriptor, fileNodeDescriptor, bytes)
' Due to an issue in the server, the file might Not be readable now, without server restart.
'Console.WriteLine("Reading the data back...")
'Dim data As Byte() = fileTransferClient.ReadAllFileBytes(endpointDescriptor, fileNodeDescriptor)
'Console.WriteLine(Encoding.UTF8.GetString(data))
' Beware that WriteAllFileBytes throws IOException And Not UAException.
Catch ioException As IOException
Console.WriteLine("*** Failure: {0}", ioException.GetBaseException.Message)
Exit Sub
End Try
Console.WriteLine()
Console.WriteLine("Finished...")
End Sub
End Class
End Namespace
